古着屋JAM公式アプリ, developed by JAM TRADING Co. Ltd is a lifestyle app available on Android for free. The app offers a card-less membership program that allows users to collect and use points across all the brands. After logging into the membership service, users can easily browse through their favorite products, purchase history, and point history. The app also features staff coordination, articles, and media information related to second-hand clothing, as well as coupons and point-up offers.

The new version of the app has some exciting features. Firstly, users can collect and use points across all the brands. Secondly, users can easily access their favorite products and the staff's recommended coordination (ONE DAY STYLE) from the app's bottom menu button. Lastly, the app provides the latest information and content related to second-hand clothing through push notifications. Additionally, the app offers exclusive benefits to members based on their membership rank, such as point redemption rate increase, birthday point gifts, and free shipping services.